Feed-water heater



2 Sheets-Sheet 1.

G. S. STRONG. Feed-Water Heater No. 22Y,O72. vPah-)Wheel April 27,1880

lles Tm: nofws linens co., PHow-LlTNo., WASHINGTON, u. c.

2 Sheets-Sheet 2. G. S. STRONG. Feed-Water Heater.

Patented April 27, 1880..

WMM/5555 fl. NrTED STATES PATENT OFFICE.

GEORGE S. STRONG, OF PHILADELPHIA, PENNSYLVANIA.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent`No. 227,072, dated April 27, 18780.

Application filed February 19, 1880.

To all whom it may concern:

Be it known that I, GEORGES. STRONG, a

citizen ofthe United States, residing in Philadelphia, Pennsylvania, have invented an Improved Feed-Water Heater, of which the following is a specification.

My 'inventioir relates to certain improvements in the feed-water heater for which Letv ters Patent were allowed to me December 24, 1o 1879; and my improvement consists in interposing between the filter describedin said application and the topsof the tubes, which are heated by exhaust-steam, a live-steam heater, for the purpose 0i' imparting a high degree of heat to the water before it reaches the ilter.

My invention further consists of a certain combination oi' heater and filter, steam-boiler, and ff'zed-pipe,` whereby live steam may be blown through the heater atintervals in or- 2o der to clean the filter.

In the accompanying drawings, Figure l, Sheet 1, is a vertical section ot' my im proved heater; Fig. 2, a sectional plan of part of the heater on the line l 2; Fig. 3, a vertical seez 5 tionof the upper portion of one ot' the heating-tubes; and' Fig. 4, Sheet 2, a diagram illustrating one of the features of my invention.

A is the cylindrical shell or casing of the heater, and to the upper end of this casin g is 3o secured the detachable cover A, thelower end being secured to the base, to the peculiar construction of which one of my improvements relates. rIhebase consists of a hollow cylinder, A, made haring at the bottom, the three partitions, B, D, and D', and the central tube, d,

the whole being cast in one piece.

In my former heater, above referred to, the plate-iron casing was carried downward and secured to a base-plate, the top. of which 4o formed the partit-ion D', the partitions B and D being separate plates secured to the interior of the casing, and the central tube being tted to openings in the latter partitions-a very expensive mode of construction compared with that adopted in the present instance, in

. which the whole of the partitions, the cylinder A", and the central tube, cast in one piece,

form a substantial base for the entire structure and inolose the inlet-chamber E and out- 5o let-chamber F.

Exhaust-steam is admitted to chamber E through the pipe a, and after taking the course described hereinafter is discharged from the chamber F through the pipe b, as in my former heater.

The central tube, d, constitutes the blow-ott' passage, which extends through the Whole of the partitions in the base, and forms a communication between the heating-chamber W and the blow-oii'pipe d', this passage and pipe hav- 6o ing no communication with either of thechambers E or F.

At the upper portion ot' the casing or shell of the heater is a mass, G, of iltering material--charcoah for instance-which is confined between the upper perforated plate, m, and lower perforated plate, it, the latter resting on a ledge in the interior ot' the casin g.

A. central rod, cf/,fpasses through both plates and through the filtering material, and has at the upper end an eye, to whiclnafter the cover A has been removed, suitable hoisting-tackle may be attached when the perforated plates have to be removed from the casing A with the iilteri n g material, for the purpose ot cleansing or ienewing-the latter.

The mass oi' ltering material and the two perforatedpplates Aare the same as in my former heater, in which, however, the filter was situated at a distance below the upper end of 8o the casing, whereas in my present improvement 'it is situated at the upper end of the Casin g, immediately below the cover, for a purpose rendered apparent hereinafter. l

A series of vertical tubes, a', pass through and are secured to the partition B of the base and communicate with the chamber E, and each of these tubes contains a smaller tube, w, the lower end of which is secured to the ,partition D and communicates with the chamber F.

The manner in which each external tube, w, is closed at the top and made to 'communicate with its internal tube is shoWni`nFig.3,Where' h represents a cap screwed onto the external tube, and having a central tubular projection fitted into the internal tube/'and slotted or perforateda-t intervals, so as to form communications between the two tubes.

In my formerheater the tubes passed through the plates m and a and through the filtering material 5 but in my present improvement .there is a space'within the casing, between the isv IOO

lower perforated plate ot' the filter and the tops of the tubes, andin this space is the coil R, to which live steam is admitted at p and permitted to'escape at q. This is an important ,5' feature of lmy invention, for'the steam-heated coil increases thetemperature of the water below the filter, andthereby lreduces the Water to the best condition for yielding to the action 'of the filtering medium.

1o The exhaust-steam admitted to the chamber E must pass upward through the annular space between each outer tubeandinner tube, and return through the latter, before it can reach the outlet-chamber F, and hence a temi 15 peraturenearly equal to that of the exhauststcaln must be imparted to the water in the heater. A

pipe, H, extends from the upper endgof the cover A to thc chestI of an injector, feed- 2o Water under pressure being discharged into this chest through a nozzle, K, and thence,

through the throat ot-zzthe injector, into' the heater at a point a short distance above the partition l.' 25 first, the introduction of the desired feedwater into the heater, and, second, an induced circulation of (water from the top of the heater 4to the bottom ot' the heating-chamber W.-

This circulating-pipe and injector' and their-`v`v 3o functions are described in my former application, in which is also described the heating ot' the water by contact with`l the tubes before 4o tween the filter and the tops of the'y tubes a- ---,steain-heater, which may consist of the coil shown g or the heater may be otherwise con- The effect ol' this is tw6fo1d:-

in the steam-space of the latter, as shown in 5o- Fig. 4, and the passage through said pipe is lunobstructed by check-valves, so that when it is desired to clean the lter G of the heater the valve of the blow-off pipe d is opened, andlive steam allowed to pass from the -boiler 55 through the pipe y apd into and through the heater, whereby the llter Gr is more effectually cleansed than by causing a backward flow of water through the same, as usual.

I claim as my inventionoo y l. The combination, in a feed-water heater, of a system of pipes heated by exhaust-steam, a filter, and a live-steam heater interposed betweenthe said pipes and filter, all substantially as set forth, 65

2. The combination, inxa feed-water heater, of the outer shell or Acasi11g,.A, andthe external and internal tubeswith a base cast in one piece and inelosing` the inlet-chamber E and outlet-chamber F, substantially as described. A7o

3. The combination of' a steam-boiler, a feedwater heater having a lilter, a valved blow-oli` pipe,and a pipe, y, affording communication between the interior of thel heater and the steam-space of the boiler,whereby live steam 75 maybe caused lto flow backward through the llter for cleansing the. latter, as set forth;

In v,testimony whereof I have signed my naine to this specification in the presence of two subscribing witnesses.

GEO. S.` STRONG.

Witnesses:

J .munisv F. ToBIN, HARRY SMITH. 

